When the market price is lower than your price section, all of your buy orders will be executed. The bot will hold BTC and as the market price rise up and return to the price section you set, bot will operate with “buy low and sell high” strategy again.
Although your unrealized profit will become negative when the market price isn’t within the section you set, the unrealized profit won’t cause actual losses to your profits as long as you don’t close the bot. So please don’t be anxious at all.
When the market price is higher than your price section, all your sell orders will be executed. At this time, your grid profit will be at the maximum status, and your unrealized provide will become minimized because your bot keeps a small amount of BTC. You can choose to close the order and convert all into USDT to a tradable amount for further uses